1． 定义:用作主语的从句叫做主语从句. 2． 构成:关联词+简单句 3． 引导主语从句的关联词有三类: (1) 从属连词that. 如:That they were sisters was unknown to anyone. 她们是姐妹这件事好象没任何人知道. (2) 从属连词whether.如: Whether he’ll come here isn’t clear. 他是否会来这里还不清楚. (3) 连接代词who, whom, whose, what, which, whoever, whatever, whichever 连接副词 where, when, how, why.如: What she did is not yet known. 她干了什么尚不清楚. How this happened is not clear to anyone. 这事怎样发生的.谁也不清楚. Whoever comes is welcome. 不论谁来都欢迎. Wherever you are is my home ---- my only home. 你所在的任何地方就是我的家----我唯一的家. 解释: 1． 主语从句能用it作形式上的主语.常以it作形式主语的句型有: A. It+be+形容词(obvious, true, natural, surprising, good, wonderful, funny, possible, likely, certain, probable, etc.)+that从句.如: It is certain that she will do well in her exam. 毫无疑问她考试成绩会很好. It is probable that he told her everything. 很可能他把一切都告诉她了. B. It+be+名词词组(no wonder, an honour, a good thing, a pity, no surprise, etc.)+that从句.如:It’s a pity that we can’t go. 很遗憾我们不能去. It’s no surprise that our team should have won the game. 我们没赢这场比赛真意外. C. It+be+过去分词(said, reported, thought, expected, decided, announced, arranged, etc.)+that从句.如: It is said that Mr. Green has arrived in Beijing. 据说格林先生已经到了北京. It is reported that China has sent another man-made earth satellite into orbit. 据报道中国又成功地发射了一颗人造地球卫星. D. It+seem, happen等不及物动词及短语+that从句.如: It seems that Alice is not coming to the party at all. Alice似乎不来参加晚会. It happened that I was out that day. 碰巧我那天外出了. E. It+doesn’t matter+连接代词或连接副词引起的主语从句.如: It doesn’t matter whether she will come or not. 她是否来这无关紧要. F. 当that引导的主语从句出现在疑问句中时.要以it作形式主语.而把主语从句后置.如:Is it true that the scientist will give us a lecture next week? 下周那位科学家将给我们作报告是真的吗? Does it matter much that they will not come tomorrow? 他们明天不来很要紧吗? 2．注意连接代词whoever, whatever, whichever等引导主语从句的含义 Whoever comes will be welcome. (whoever=the person who) 来的人将受到欢迎. Whatever he did was right. (whatever=the thing that) 他所做的事情是正确的. 第9讲 强调句 在课堂教学中.英语教师都按照下面的句型去施教.即:It is / was -that /who-用来强调一个句子中除谓语以外的任何句子成分.例如: I bought this car in that shop last month. It was I who/that bought this car in that shop last month. It was this car that I bought in that shop last month. It was in that shop that I bought this car last month. It was last month that I bought this car in that shop. 就这样.再举几个例子.让学生练练.该语法讲解到此结束.可是.高考并不单纯考查这样一些基本的句式.下面几点还有待于老师去延伸讲解. 先请看下面的两个句子: (1) It is on this arable land that the farmers produce food for the whole population of China. (2) It was from the early 1990s that scientists started to develop new techniques to increase agricultural production without harming the environment. 以上两个句子都是It is(was)-that-结构引导的强调句.在该句型中it没有任何意义.常用来强调主语.宾语.状语等.考查时常把被强调部分结构复杂化.即名词或代词后常跟有定语从句.动词不定式或同位语对名词起修饰.补充说明.同学们常把它和其它相似结构混淆.难以掌握.近几年的高考对强调句的考查常从以下几个方面进行.现归纳如下.希望同学们能突破这个难点. 【查看更多】
